Locomotive



EEZQEM? HARRISON LOCOMOT IVE Filed June 10, 1929 2 Sheets-Sheet l INVENTOR. Bezzjamziz flan #2022 A TTORNE Y.

Aug, 11, 11933.. BF. HARRISON LOCOMOTIVE Filed June 10, 1929 2 Sheets-Sheet 2 I N V EN TOR Bezzykmz/zzflarwazz H 5 M M A TTORNEY.

Patented Aug. 1, 1933 'LoooMoTIvE Benjamin F. Harrison, Glenns Fcrry. ldaho, assignor to The Standard Stoker Gompany, Incorporated, a Corporation of Delaware Application June 10, 1929. Serial No. 369,839

' 2 Claims. (01. -73

My invention relates to improvements in locomotives and more particularly to improvements.

in locomotive smoke box construction. a

It is the principal object of this invention to provide in a locomotive of the forceddraft type, a novel smoke box construction having a chamber arranged to receivesteam exhausted by the locomotive, this chamber embracing a secondary chamber and admitting exhaust steam thereto at a predetermined pressure for operating locomotive accessories, the exhaust steam in'the secondary chamber being heated by the gasesrissuing from the fiues 01 the boiler.

A more specific object of this invention'isto provide in a locomotive of the'forced draft type, a novel smoke box construction of the ,type above specified, wherein the first named exhaust chamber is provided with an excess pressure valve set to exhaust steam from such chamber to the atmosphere when the steam withinsaid chamber exceeds a predetermined pressure; a c

Other objects and advantages of my invention will appear as the following escription is read in connection with the accompanying drawings, in which Fig; 1 is a longitudinal diagrammatic view of a forced draft locomotive with a portion at the front end broken away showing the smoke box construction in section; V V

Fig. 1a is a longitudinal diagrammatic View of a tender with portions broken away in sectionshowing the improved feed water heating construction;

Fig. 2 is a transverse section on the line 22 of Fig. 1;

Fig. 3 is a transverse section on the line 33 of Fig. 1a; 7

Fig. 4 is an enlarged view in longitudinal vertical cross section of the float valve shown in Figs. 1a and 3; and

Fig. 5 is a detail View of a portion of the feedwater heating system;

Referring now'to the drawings, a locomotive of the forced draft type is indicated generally by the numeral 1c and the tender by the numeral 11. At 12 is shown the locomotive smoke box which is divided into a rear chamber 13 and a forward chamber 14 by a partition wall 15. The flues l6 communicate with the rear chamber 13 and deliver thereto the smoke and hot products of combustion from the locomotive firebox, the smoke and hot gases being then discharged from the chamber 13 through the stack 1'7. 7

The forward chamber 14: constitutes a'main exhaust chamber receiving exhaust steam from side of the locomotive.

the cylinders 18 through the exhaust passage 19. The exhaust passage 19 delivers to the main chamber 14; through an opening 20 in itsbottom wall. The chamber 14 is provided with an exhaust nozzle 21 circumscribing the marginal edges of the opening 20 and extending sufiiciently high above the bottom of the chamber 14 to prevent condensate from flowing back into the cylinders Exhaust steam is-carried back to the tender 11 by. the sectional delivery pipes 22 for heating the boiler feed water as willbe hereinafter described in detail. The sections 23 of the delivery pipes 2 2 open at their forward ends into the main steam chamber 14 and extend rearwardly, one'on each A pipe 24 opens at its forward end into the bottom of the main steam chamber 14 and at its rearward end. into the steam delivery pipe 22,. permitting condensate from the chamber114 to flow into the delivery pipe 22, fromwhence it is carried to the tender by the force of the steam through the delivery pipe 22. A check valve 25; in the unit 25a, connectingthe drain pipe 24 and pipe section 23, normally closes the delivery opening of the drain pipe 24'andis arranged to open in one direction only to permit condensatefrom the drain pipe I 24 to flow into the delivery pipe 22, and will close should back pressure occur in the delivery pipe 22.

- .Within' the main steam'chamber 14 is a secondary chamber 26 communicating with the chamber 14 through the openings 27 in the floor 28 of'the valve cage 29.7 The marginal edges of the openings 27 are beveled to form the seats 30 for the valve members 31. A bridge 32 over the valve cage floor 28 is provided with the openings 33 forming guides for the stems 34 or" the valve members 31. 31 is such that they will be raised by a predetermined steam pressure, admitting and maintaining a portion of the exhaust steam in the chamber 26. Other means, well known in the art, may be employed to control the raising of the valves 31 at predetermined pressures.

Extending through the chamber 26 are a plurality of pipes 35 communicating at either end with the smoke chamber 13, through whichthe hot gases from the locomotive firebox are permitted to pass, superheating the exhaust steam in the chamber 26. The superheated exhaust steam from the chamber 26 may be conducted through the pipe 260 for operating the various locomotive accessories.

Poppet or excess pressure valves 14a, of'con- The weight of the valve members permissible in the locomotive cylinders.

The tender 11 comprises an auxiliary feed water chamber 36 at its forward end, an exhaust steam chamber 37 at its rearward end and a main Water chamber 38 intermediate its ends. The sections 39 of the delivery pipes 22 on the tender 11 are admitted to the bottom of the auxiliary chamber 36, one on each side, and are then extended in an upright position to the upper.

part of the chamber 36. Flexible sections 40 of the delivery pipes 22 connect the sections 23 and 39 to permit articulation between the locomotive and tender. A series of pipes 41 extend longi tudinally through the .feed water chamber 36 opening at their forward ends into the chamber 36 and at their rearward ends into the exhaust chamber 37. e 1

Exhaust steam from the cylinders 18 passes into the chamber 14 of the locomotive and then flows through the delivery pipes 22 into the chamber 36 of the tender and thence through the pipes 4i heating the feed water in the main water chamber 38. r

The auxiliary chamber 36 communicates with the main water chamber 38 through an opening 42 near the bottom thereof. The opening 421s controlled by a float valve 43 regulating the flow of water into the chamber 36. The float 44'raises and lowers the valve member 45 through the stem 46, closing and opening the passage 47, asthe level of the water is raised or lowered. i4 is arranged at such a height'thatthe level of the water in the chamber '36 cannot'rise above the entirely stopped on steep grades when the water level in the tank is low. In the present construction water is trapped in the chamber 36 forming a reservoir from which preheated water may be supplied to the locomotive boilerregardless of the steepness of the grade. On level stretches of road from the main feed water chamber 38. 4

'pipe 41.

will also be carried into the chamber 36. By this This construction further provides for conservation of the water of condensation from the steam used to preheat the water in the main chamber 38 and water of condensation in the delivery pipes 22. Water of condensation gradually accumulates in the exhaust chamber 3'7 and will flow into the chamber 36 through the lowermost Condensation in the delivery pipes 22 improved construction the locomotive is enabled to go longer distances before replenishing the water supply.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent is the following:

1. In a locomotive of the forced draft type hav-- ing a smoke box and fiues in communication with said smoke box, the combination of an exhaust chamber within said smoke box arranged to re ceive steam exhausted by the locomotive; an outlet arranged to conduct steam from said exhaust chamber; a secondary chamber embraced by said exhaust chamber, said secondary chamber forming a source of steam supply for operating locomotive accessories; valves in communication with said exhaust chamber and said secondary chamber, said valves being arranged to open at a predetermined pressure within said exhaust chamber, and passages extending through said secondary chamber forming a passageway for the gases issuing from said flues.

2. In a locomotive'of the forced draft type having a smoke box and flues in communication with said smoke box, the combination of an exhaust chamber within said smoke box arranged to receive steamfl exhausted by the'locomotive; an outlet arranged to conduct steam from said exhaust chamber; a secondary chamber embraced by said exhaust chamber, said secondary chamber forming a source of steam supply for operating locomotive accessories; valves in communication with said exhaust chamber and said secondary chamber, said valves being arranged to open at a predetermined pressure within said exhaust chamber, and passages extending through said secondary chamber forming a passageway for the gases issuing from said flues, said first named exhaust chamber being provided with an excess pressure valve set to exhaust steam from such chamber to the atmosphere when the steam within said x e s re etermined 1 ss e. the reservoir in tne chamber 36, 1s replenished m c a p d p 9 ur BENJAMIN F. HARRISON. 

